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TestDrive is a project that makes it very easy to download and run the latest daily Ubuntu development snapshot in a virtual machine. Actually, it can be configured to download and run any URL-access ISO in a virtual machine. But the primary goal is to provide a very simple method for allowing non-technical Ubuntu users to test and provide feedback on the current Ubuntu release under development.Install TestDrive in Ubuntu Lucid/Karmic

Open the terminal and run the following commands

sudo add-apt-repository ppa:testdrive/ppa

sudo apt-get update

sudo apt-get install testdrive

For Other ubuntu users

First you need to edit /etc/apt/sources.list file open terminal and run the following commands

Then you can either run testdrive from the command line, or use the menu, Applications -> System Tools -> Testdrive.

Then, a menu will pop up, with a menu of Lucid daily images. If you have previously downloaded any of these, you should see a time stamp of the cached file. If you run testdrive everyday, your cache will stay up-to-date, and the incremental download will be much faster!

Select one of the offered ISOs, or enter a URL to another one of your choosing, and you should be off and running.

Same..
sudo apt-get install testdrive
Reading package lists… Done
Building dependency tree
Reading state information… Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
testdrive: Depends: cpu-checker but it is not installable
E: Broken packages